Author
N. Nageswara Rao
Other affiliations: National Environmental Engineering Research Institute
Bio: N. Nageswara Rao is an academic researcher from Central Salt and Marine Chemicals Research Institute. The author has contributed to research in topics: Schiff base & Pyrazolone. The author has an hindex of 7, co-authored 8 publications receiving 275 citations. Previous affiliations of N. Nageswara Rao include National Environmental Engineering Research Institute.
Topics: Schiff base, Pyrazolone, Salicylaldehyde, Ruthenium, Hydrazide
Papers
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TL;DR: In this paper, the synthesis and characterization of cis-MoO2(L) (solv) is described, where the tridentate Schiff base ligand was obtained by condensation of salicylaldehyde and salicylic acid hydrazide in 1:1 ratio.
107 citations
TL;DR: In this article, a binuclear structure has been proposed for the OVadium(IV) complexes of aroyl hydrazone Schiff bases, viz. salicyloyl, nicotinoyl and benzoyl hydrazones, have been synthesized and characterized by elemental analysis, spectroscopy (IR and UV-vis) methods, magnetic susceptibility, EPR measurements, molar conductance and cyclic voltammetry studies.
66 citations
TL;DR: In this paper, the synthesis and characterization of some cis-dioxomolybdenum(VI) complexes with bidentate and tetradentate Schiff base ligands derived from reactions of 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone with amines, such as p-anisidine, m-phenitidine and m-toluidine, o-, m-and pphenylenediamine, and benzidine are reported.
39 citations
TL;DR: In this article, the synthesis and characterization of ruthenium(II) Schiff base complexes derived from 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone are reported.
28 citations
TL;DR: In this article, the reaction of the bi-and tetradentate Schiff bases with MoO2(acac)2 in 2:1 and 1:1 ratios, respectively, gave diamagnetic molybdenum(VI) mononuclear complexes having the general formulas cis- [MoO2 (L)2] (LH = bidentate Schiff base, sal-AH, salPH or sal-TH).
Abstract: Dioxomolybdenum(VI) complexes of bi- and tetradentate Schiff bases derived from salicylaldehyde and amines such as p-anisidine, m-phenetidine, p-toluidine, o-, m- and p-phenylene- diamine and benzidine have been synthesised. Reactions of the bi- and tetradentate Schiff bases with MoO2(acac)2 in 2:1 and 1:1 ratios, respectively, gave diamagnetic molybdenum(VI) mononuclear complexes having the general formulas cis- [MoO2(L)2] (LH = bidentate Schiff base, sal-AH, sal-PH or sal-TH), cis- [MoO2(L1)] (L1H2 = tetradentate Schiff base with o-phenylene- diamine, sal-ophdH2), the ligand bridged dinuclear complexes, cis-[Mo2o4(L2)(OCH3)2] (L2H2 = tetradentate Schiff base with m- and p-phenylenediamine, sal-m-phdH2 or sal-p-phdH2) and cis- [Mo2O4(L3)(OCH3)2(dmf)2] (L3H2 = tetradentate Schiff base with benzidine, sal-bzH2). These complexes were characterised by molar conductance, elemental analyses, IR, UV-vis, and 1H NMR spectra and cyclic voltammetry.
18 citations
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TL;DR: Schiff bases, named after Hugo Schiff, are aldehyde- or ketone-like compounds in which the carbonyl group is replaced by imine or azomethine group.
Abstract: Schiff bases, named after Hugo Schiff, are aldehyde- or ketone-like compounds in which the carbonyl group is replaced by imine or azomethine group. They are widely used for industrial purposes and also have a broad range of applications as antioxidants. An overview of antioxidant applications of Schiff bases and their complexes is discussed in this review. A brief history of the synthesis and reactivity of Schiff bases and their complexes is presented. Factors of antioxidants are illustrated and discussed. Copyright © 2016 John Wiley & Sons, Ltd.
140 citations
TL;DR: In this paper, the synthesis and characterization of cis-MoO2(L) (solv) is described, where the tridentate Schiff base ligand was obtained by condensation of salicylaldehyde and salicylic acid hydrazide in 1:1 ratio.
107 citations
TL;DR: A new oxido-peroxido molybdenum(VI) complex [MoO(O2)L(CH3OH)] was synthesized, using salicylidene benzoyl hydrazine as tridentate ONO donor Schiff base ligand (H2L) as discussed by the authors.
106 citations
TL;DR: In this paper, the authors investigated the structure of the pyrazolone derivative N-(1-phenyl-3-methyl-4-propyl-pyrazolones-5)-salicylidene hydrazone (H2L) and its copper(II) complex [Cu2L2CH3OH]·2 CH3OH have been both synthesized and characterized by elemental analyses, IR spectroscopy, X-ray crystallography, theoretical calculation and pharmacological testing.
98 citations
TL;DR: In this article, the crystal structure of 1-phenyl-2,3-dimethyl-4-(N-3-formyl-6-methyl-chromone)-3-pyrazolin-5-one (HL) has been determined by X-ray diffraction studies, as well as the one of its copper(II) complex [CuL(OAc)]·CH3OH which contains an anionic ligand and an acetate in the coordination sphere of the metal.
95 citations